APA (7. basım) Alıntı

English Language Services. (1950). Intensive course in english. English Languaje Services.

Chicago Style (17. basım) Atıf

English Language Services. Intensive Course in English. English Languaje Services, 1950.

MLA (9th ed.) Atıf

English Language Services. Intensive Course in English. English Languaje Services, 1950.